The office of North West Wales coroner, Dewi Pritchard Jones, confirmed that he had been made aware of the discovery but would not be launching an investigation as the finds were of an archaeological nature.

No access

An Anglesey Council spokesman added: “Unfortunately, because the Llangefni link road is a construction site, public access to the excavation is prohibited.

“However, the results of the archaeological excavation will be made public on completion through the Oriel and the regional Historic Environment Record maintained by Gwynedd Archaeological Trust.”